The outlets stores at mid city are still overpriced in my opinion so we love to visit the 'Premium Outlets' near the airport - they have a character warehouse, osh kosh, gap, old navy, adidas, footlocker, toyworld and many more of our favourites.
Best tip is to join PO online, they will ask your favourite locations, just browse through and tick whichever ones you are likely to travel by, then they send you sale emails etc. No problem for most of the year I just delete them but near to our trip I take notice of special days (extra percentage off plus normal reduced prices). By signing up each time you are visiting the outlets print off a coupon for a free coupon booklet, once you arrive at the outlets go directly to the VIP office and collect coupon book (it will be difficult to walk past all those shops as the office is in the centre).
Prior to arriving you will need to write a list of kids sizes, what you have stored, coming as hand me downs from each child, a copy of their footprint and current shoe sizes etc etc. Leave DH and kids back at hotel pool...this is very important. There are no trolleys available so bring the stroller without the baby! We just buy a laundry hamper on wheels and leave it at hotel once we're done. If you have a rental car you do not need the stroller or laundry hamper to carry your purchases just store them in the car when your arms get too full!
Remember in the USA coupon and coupon go together so as an example on one visit we got $3100 kids clothes at Osh Kosh for $180 and fit my kids for three years! If you spend over $500 in most clothing stores they give further discounts - it's crazy! And my DH was only there once to witness this...see previous rule about leaving at pool...